To synthesize the given compound via an SN2 reaction, which of the following options is appropriate:
5-chloro-pentan-1-ol should be treated with a base like OH−
The given compound is a cyclic ether. The base OH− abstracts a proton and the resulting oxygen (anion) nucleophile displaces chloride in an intramolecular SN2:
Small amounts of the pentane-1,2-diol is also formed.